if (document.images) {

  productson = new Image();
  productson.src = "/images/b_products_r.gif";

  productsoff = new Image();
  productsoff.src = "/images/b_products.gif";
  
  manufacturerson = new Image();
  manufacturerson.src = "/images/b_manufacturers_r.gif";

  manufacturersoff = new Image();
  manufacturersoff.src = "/images/b_manufacturers.gif";
  
  oemson = new Image();
  oemson.src = "/images/b_oems_r.gif";

  oemsoff = new Image();
  oemsoff.src = "/images/b_oems.gif";
  
  aboutuson = new Image();
  aboutuson.src = "/images/b_aboutus_r.gif";

  aboutusoff = new Image();
  aboutusoff.src = "/images/b_aboutus.gif";
  
  contactuson = new Image();
  contactuson.src = "/images/b_contactus_r.gif";

  contactusoff = new Image();
  contactusoff.src = "/images/b_contactus.gif";
  
  }

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}